﻿//    Copyright 2014 LuoZhihui
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
//      http://www.apache.org/licenses/LICENSE-2.0
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.

#region  导入名称空间

using System;
using System.Linq.Expressions;

#endregion

namespace LotteryEngine.Infrastructure.Querying
{
	public class Criterion
	{
		public Criterion(string propertyName, object value, CriteriaOperator criteriaOperator)
		{
			PropertyName = propertyName;
			Value = value;
			this.CriteriaOperator = criteriaOperator;
		}

		public string PropertyName { get; }

		public object Value { get; }

		public CriteriaOperator CriteriaOperator { get; }

		public static Criterion Create<T>(Expression<Func<T, object>> expression, object value,
			CriteriaOperator criteriaOperator)
		{
			var propertyName = PropertyNameHelper.ResolvePropertyName(expression);
			var myCriterion = new Criterion(propertyName, value, criteriaOperator);
			return myCriterion;
		}
	}
}